The pressure difference between an Oil pipe and water pipe

The pressure difference between an oil pipe and water pipe is measured by double fluid manometer as shown in figure. For the given fluid heights and specific gravities, calculate the pressure difference (PA-PB). Note: Specific weight of water is 9810 N/ms. h, = 0.55 m Glycerin SG = 1.26 h =0.1 m Oil SG = 0.88 Water SG = 1.0 h, = 0.42 m h; = 0.20 m -X Mercury SG = 13.5 O a. 27,554.33 kPa O b. 17,328.55 Pa O c. 17.3 kPa O d. 27.6 kPa